Which of the following statements is true?
a. the cell envelope material of gram-positive bacteria contains endotoxin activity.
b. the periplasmic space contains the peptidoglycan layer of gram-negative bacteria.
c. the structure/composition of the membrane lipids of archaea are the same as in bacteria.
d. in comparing the cell envelopes of gram-negative bacteria and a gram-positive bacteria, it would be accurate to say that gram-positives have much more lipid material in their cell envelope than a gram-negative.
e. all the above are false statements, none are true.

B. The periplasmic space contains the peptidoglycan layer of Gram-negative bacteria.

Explanation:

Periplasma is the compartment that surrounds the cytoplasm in Gram negative bacteria. It is comprised between the plasma membrane (which is inward) and the outer membrane of the gram negative, on the outside.

This periplasmic space contains the peptidoglycan layer and proteins that are responsible for receiving extracellular signals, among other functions.

The high concentration of peptidoglycan causes this space to be in a gel-like state.

21 stacks

step-by-step explanation:

divide 630/30

21 stacks

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the level of progesterone is low at the pre-ovulatory phase of the cycle but it gradually increases and the levels are high at the luteal phase. if pregnancy occurs, the level of progesterone will be high throughout the pregnancy.

if egg is fertilized and the mother gets pregnant, progesterone starts preparing the uterus for the implantation. it starts building up the lining of uterus and make it hostile of the period of pregnancy.